21990906

素因数分解:

$2^1\times 3^3\times 7^2\times {\mathrm{8311}}^1$

素因数の和:8336

約数の個数: 48

約数和(自身を含む): 56854080

約数和(自身を除く): 34863174

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 49, 54, 63, 98, 126, 147, 189, 294, 378, 441, 882, 1323, 2646, 8311, 16622, 24933, 49866, 58177, 74799, 116354, 149598, 174531, 224397, 349062, 407239, 448794, 523593, 814478, 1047186, 1221717, 1570779, 2443434, 3141558, 3665151, 7330302, 10995453, 21990906]

約数ペア:

[(1, 21990906), (2, 10995453), (3, 7330302), (6, 3665151), (7, 3141558), (9, 2443434), (14, 1570779), (18, 1221717), (21, 1047186), (27, 814478), (42, 523593), (49, 448794), (54, 407239), (63, 349062), (98, 224397), (126, 174531), (147, 149598), (189, 116354), (294, 74799), (378, 58177), (441, 49866), (882, 24933), (1323, 16622), (2646, 8311)]